Hello,
As you ask, Zan, I will give my opinion. It's not original or new idea : I think it's very very very hard to play evil in-game.
I completly agree with all peoples who are arguing that without murder or steal function it's not possible to be evil.
Why ? Look at my character : Baston. I try to RP it as an evil character who is chaotic by nature but try to be lawfull for various reasons. I have wrote the young age of Baston, he have a very bloody past. I never post it for a simple reason : I can't play Baston's character as I should play it with this story.
A little anecdot : the other day I was wandering on the plaza with Essiri we wanted to fight, just kill for the pleasure of killing (yes evils do that, I'm thinking Baston a bit like the Harkonnen family in Dune : violent and nasty). But I and my character gain no satisfaction killing the weaks for sport so I was searching for characters I know (potential strong fighter). 'till I never look at peoples' description, I couldn't tell what peoples around level was. I finally met Asalya and Illori, and like a could super-evil I asked politely "please miladies will you fight with me ?" the answer was "no". End of the story : the super-evil killer is nice as a sheep... *ironical smiles*
My character have many non-visible activities, but the visible part of his character is to be a killer... In Infidel Slayers their is "Slayers"... Our guild is not designed to slay cucumbers or trees...
He don't care about the laws because the only usefull laws are his owns, if he wants to kill someone he will try.. but no, because the oponent will decline the challenge.
I think you can be evil like somes are : doing nothing but manipulations and complots. That's only a part of evils RP like said UtM :
Simply put, you cannot RP an evil character with most folks. They do not wish to lost their money, their pride, or their life. Playing a good character is easy, because if you don't wish to RP with someone who is trying to be evil, you can just ignore them. You are still 'good'. Bad RP, but true.
However, if you are on the flip side, and try to RP an evil char and get ignored, guess what? You aren't evil. By being ignored, your character is reduced to nothing. It also does not help with the good always wins attitude. Playing an evil/bad character is a two sided thing. If it is only on your side, you are considered a spammer by those who are playing 'good' characters.
Playing evil is hard in fact mainly because "goods" player wants to have an evil char around just when they need to kick a bad guy, otherwise most of them just ignore evils char. I think we could have a "joker" system, wich allow us to free PvP someone and this joker could be used only 3 times a day... Just to make everybody remember than evils are not NPCs

In brief, if I look to the evils definitions of evil I saw before I agree : you can play evil. If I take the D&D definition, like Xordan said, it's just not possible. Stealing food at weddings is not the kind of "evilness" I want for my character...
Insulting someone means you have an interest in insulting him... All evils are not ruffian.. I'm fond of Dracula, that is a true evil : a gentleman killer.
Evil is not only about PvP, steal and back-stab but without it a lot of things are lacking to evil's characters. It's just so frustrating to be forced to stand like an idiot because someone have ignored you... UtM is so true when he said "However, if you are on the flip side, and try to RP an evil char and get ignored, guess what? You aren't evil. By being ignored, your character is reduced to nothing."
Trying to play an evil character since I'm ingame, I think it's just not possible. You can try to
looks evil but you can't
be evil.
But, of course, the fault is maybe on my side not being able to be a good roleplayer. But not having any alt I concentrate all my eforts on this one... And thinking it's a mess is a little disappointing.
I surely don't think I am perfect ... at least when talking about my RP
